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A sensitive kinetic spectrophotometric determination of traces of tungsten in solution based on its inhibitory effect on the decolorization reaction of potassium permanganate
(naslov ne postoji na srpskom)
Petković Branka ORCID, Micić Ružica ORCID, Simonović Ranko ORCID
Univerzitet u Prištini sa privremenim sedištem u Kosovskoj Mitrovici, Prirodno-matematički fakultet, Srbija

e-adresa: branka.petkovic@pr.ac.rs
Ključne reči: Kinetic method; spectrophotometric determination; inhibition; tungsten(VI); 4-hidroxycoumarine
Sažetak
(ne postoji na srpskom)
The present work describes a rapid and sensitive method for the determination of ultra micro amounts of tungsten (VI) based on its inhibitory effect on the oxidation of 4-hidroxycoumarine by potassium permanganate in the presence of hydrochloric acid. The sensitivity of the method is 20 ng/cm3. The probable relative error is -4.8-13 % for the W(VI) concentration range 250 to 20 ng/cm3, respectively. Kinetic equations for the investigated process which determine the order of the reactions regarding to each reaction parameter under certain experimental conditions were proposed, and they allowed quantification of the unknown concentrations W(VI) in solution. The detection and quantification limit of the method are 4.5 and 15.1 ng/cm3. The effects of certain foreign ions upon the reaction rate were determined for the assessing the selectivity of the method.
Reference

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O članku

jezik rada: engleski
vrsta rada: izvorni naučni članak
DOI: 10.5937/univtho6-10437
objavljen u SCIndeksu: 01.09.2016.
metod recenzije: dvostruko anoniman
Creative Commons License 4.0

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